Composition for making shingles.



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44125030123 a. snowy, or mmnuaroms, MINNE.S6TE,1 Assronon or suvnu TWENTY- 7 rename '20 J.- c. DONAHUE AN'D SEVEN or fitnfimroms, mmuuso'ra.

Hessian;

its ijrawin To all whom it may concern:

Be it known that I, Tnnononn H. rowls, citizen of the United States, and a resident of Minneapolis, in the county of Hcnnepin 5 andstate of Minnesota, have invented certain new and useful l-hilgovements in a Composition for Making S 'ngles, of which thejollowing is a. spec cation. one object of .my invention is to pro- 16 ride an improved composition for making shingles and an improved and inexpensive I shingle produced from the compound.

Another ohjectof my invention is to proride in a compound and shingles produced therefrom, means for strengthening theresultant shingle.

thcseand incidental objects in view the iny'ention consists of certain products formed in a composition as described in the 20 following; specification.

I prefer to form my compound of oneeight' ofa bitumen andseven-eighthsof 1 coaldust. I

I "refer to user-as a bitumen the asphalt-um pro uct roduced from the Texas fields, and ordinari y-known as the 'Iexasfiphaltum, and as a coal dust I preffio use what 15 called slack dust. v p w To combine the two products the coal dust 80 must first be heated to a partial incandescence, the bitumen then mixed with the heated coal, and the compound agitated by any suitable means to thoroughly giix the, two products;

mixed they are then pressed together, either under a fiat pressure device'or under rollers, Qandthe heavier the pressure the :better the product all things being equal. 40

After the product has come from the rolls I then prefer to coat one or both sides of the resultantshect with mmon salt, NaCl, by.

OOMPOSITIONEOIR MA'K'ING SHINGLES..

Patented Apr. 23, 1918.

Applieeiim filed August 27, 1917. Serial No; 188,523.

Specification of Letters Patent.

1 of certain products,

- dust, while When the products haveheenitliroughly-= TWENTY-FCiiIRTH$ ro DAVE BLISS. Born sgrinkling the salt on the surfac cf the s et and the heat of the compound melts the salt, chemically mixes the products, and

gives a fire retardant sheet.

. To give additional stiffness to the sheet soi 1'? formed, I sometimes press'thecompound between two sheets of gaute, the corporating the gauze within i:- e body of ressure-in-y I:

the sheet so that there is a certain amount of compound outside ofi the two sheets so incorporated, and this use of gauze may be employed either with or without the coat of salt.

one particular manner and as a combination I do'not wish it to be understood that 1 limit myself to this way, as it is evident the invention may varie lowing claims.-

Claims shingles formed of sevcn-eighths M then mixed with one-eighth of bitumen thoroughly mixed with the coal dust in its partial' incandescent state and the compound thoroughly amalgamated through pressure.

2. A- compound for making roofing shingles formed by heating coal dust to a partial incandescence, mixing with the coal it is so heated, oneseventh of the same weight of a bitumen, and a 'tating turejnto a sheet. I 3. A compound for making shingles and the, likc. comprised of bitumen and coal dust thoroughly mixed, the coal (lust being partially oxidized before the hitumen is combinecl therewith.

'IHEODORE H. BROYVN.

6f to in many ways within the scopeiof the fol a the mixture so formed andfifessing t e mixp I 65 -Whi1e 'I'htwe described my invention -iii f v 

